Elasmobranchii (sharks and rays) > Squatiniformes
(Angel sharks) > Squatinidae
Etymology: Squatina: Latin, squatina, -ae = a kind of shark (Ref. 45335). More on author: Cuvier.
Environment / Climate / Range
Marine; demersal; depth range 30 - 500 m (Ref. 247). Subtropical; 43°N - 19°S, 18°W - 30°E
Length at first maturity / Size / Weight / Age
Maturity: Lm ?, range 124 - ? cm
Max length : 188 cm TL male/unsexed; (Ref. 247); common length : 100.0 cm TL male/unsexed; (Ref. 26999)
Eastern Atlantic: western Mediterranean, Morocco, Senegal, Guinea to Nigeria, Gabon to Angola.
Found mainly on muddy bottom (Ref. 26999). Feeds on small sharks and jacks. Ovoviviparous (Ref. 50449). Utilized dried salted and fresh for human consumption; liver oil and hide also utilized (Ref. 247).
Compagno, L.J.V., 1984. FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 1 - Hexanchiformes to Lamniformes. FAO Fish. Synop. 125(4/1):1-249. Rome: FAO.
IUCN Red List Status (Ref. 90363)
Threat to humans
Fisheries: minor commercial
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
CollaboratorsPicturesStamps, CoinsSoundsCiguateraSpeedSwim. typeGill areaOtolithsBrainsVision
Estimates of some properties based on empirical models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00705 (-0.24094 - 0.25504), b=3.06 (2.93 - 3.19), based on LWR estimates for this family-BS (Ref. 93245
Trophic Level (Ref. 69278
): 4.0 ±0.6 se; Based on diet studies.
Resilience (Ref. 69278
): Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be <100).
Vulnerability (Ref. 59153
): High to very high vulnerability (75 of 100) .